CVE-2003-0743 Memory corruption in n/a
Remote attackers can execute arbitrary code on Exim mail servers via a heap-based buffer overflow in HELO/EHLO command processing.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2003-0743?
CVE-2003-0743 is a high-severity memory corruption vulnerability in n/a, published on 6 Sep 2003. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Heap-based buffer overflow in smtp_in.c for Exim 3 (exim3) before 3.36 and Exim 4 (exim4) before 4.21 may allow remote attackers to execute arbitrary code via an invalid (1) HELO or (2) EHLO argument with a large number of spaces followed by a NULL character and a newline, which is not properly trimmed before the "(no argument given)" string is appended to the buffer.
Which versions are affected by CVE-2003-0743?
It affects 1 product.
Products include University of Cambridge Exim.
How do I fix CVE-2003-0743?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2003-0743 being exploited?
There is no known exploitation of CVE-2003-0743 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as CVE-2003-0698, DSA-376, GHSA-gjpp-m73q-mp4j.